Scrape meterics from system process on each node

1 files changed, 24 insertions, 0 deletions

diff --git a/doc/telemetry.md b/doc/telemetry.md
index ee8d0dd..1e405a5 100644
--- a/doc/telemetry.md
+++ b/doc/telemetry.md
@@ -1,3 +1,27 @@
+# create elasticsearch folders on all nodes
+
+```bash
+mkdir -p /mnt/ssd/telemetry/es_data/nodes
+chown 1000 /mnt/ssd/telemetry/es_data/nodes
+```
+
+# generate ca and tls certs for elasticsearch cluster
+
+start a `bash` in an elasticsearch image, such as `docker.elastic.co/elasticsearch/elasticsearch:7.17.0`: `docker run -ti docker.elastic.co/elasticsearch/elasticsearch:7.17.0 bash`
+
+generate a ca and node certs:
+
+```bash
+./bin/elasticsearch-certutil ca
+./bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
+```
+
+copy `elastic-certificates.p12` to `/mnt/ssd/telemetry/es_data` in all nodes, and chown it:
+
+```bash
+chown 1000 /mnt/ssd/telemetry/es_data/elastic-certificates.p12
+```
+
 # create elasticsearch passwords
 
 in elasticsearch container